fix error while converting enums to strings

verse/parser/parser.py

@@ -600,6 +600,8 @@ def proc(node: ast.AST, env: Env) -> Any:
     elif isinstance(node, ast.For) or isinstance(node, ast.While):
         raise NotImplementedError("loops not supported")
     elif isinstance(node, ast.If):
+        if astunparser.unparse(node)=='\nif lane_map.has_left(ego.lane_mode):\n    output.vehicle_mode = VehicleMode.SwitchLeft\n':
+            print("stop")
         if is_main_check(node):
             return START_OF_MAIN
         test = proc(node.test, env)
@@ -624,7 +626,7 @@ def proc(node: ast.AST, env: Env) -> Any:
         return env.lookup(node.id)
     elif isinstance(node, ast.Attribute) and isinstance(node.ctx, ast.Load):
         if isinstance(node.value, ast.Name) and node.value.id in env.mode_defs:
-            return node.attr
+            return ast.Constant(node.attr)
         obj = proc(node.value, env)
         # TODO since we know what the mode and state types contain we can do some typo checking
         if not_ir_ast(obj):